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Imageability effect on the functional brain activity during a naming to definition task.

Francesca Garbarini¹, Fabrizio Calzavarini², Matteo Diano³

¹Imaging and Plasticity Research Group at Department of Psychology, and Neuroscience Institute of Turin, University of Turin, Torino, 10100, Italy; Center for Logic, Language and Cognition (LLC), Turin, Italy; MANIBUS Lab, Department of Psychology, University of Turin, Turin, Italy; Department of Psychology, University of Turin, 10123, Torino, Italy.

Neuropsychologia

|November 26, 2019

Summary

This summary is machine-generated.

This study reveals that visual imagery aids word retrieval from definitions. Brain activity in visual processing areas is linked to inferential competence, especially with highly imageable definitions.

Keywords:

Functional magnetic resonance imaging (fMRI)Lexical inferential competence Posterior parietal lobe Ventral temporal cortex Visual imagery

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Area of Science:

Neuroscience
Cognitive Psychology
Psycholinguistics

Background:

Lexical competence involves linking words to the world (referential) and to other words (inferential).
The role of visual imagery in inferential competence remains underexplored.

Purpose of the Study:

To investigate the influence of visual imagery on lexical inferential competence.
To identify neural correlates associated with visual imagery during word retrieval from definitions.

Main Methods:

An auditory inferential naming-to-definition task was employed.
Visual imageability of definitions and target words was manipulated.
Brain activity was measured using neuroimaging techniques.

Main Results:

Visual imageability-related brain activity was observed in the posterior-parietal and ventrotemporal cortex (including the fusiform gyrus).
A "definition effect" indicated spontaneous visual imagery activation when retrieving words from highly imageable definitions.
This effect was independent of the target word's imageability.

Conclusions:

Spontaneous visual imagery plays a role in semantic processing, particularly during word retrieval from imageable definitions.
Neural correlates of semantic processing are influenced by the interplay between visual imagery and semantic properties.
Findings contribute to understanding the neural basis of lexical competence and visual imagery's role.